Matthew S. Markis, D.O.
Psychiatry Physician · Calabasas, CA
Matthew S. Markis, D.O. is a psychiatry physician with a practice address in Calabasas, California, and NPI 1780944470, issued on May 29, 2012. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Matthew S. Markis
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- R2147 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 23622 Calabasas RD, Calabasas, CA 91302
- Phone
- (818) 921-4300
- Enumerated
- May 29, 2012
- Record last updated
- Oct 17, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (877) 917-3450
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 23622 Calabasas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Matthew S. Markis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average psychiatry physician in 2024
192 Medicare Part D claims for 18 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Gabapentin20 claims
- Alprazolam17 claims
- Divalproex Sodium14 claims
- Paroxetine Hcl13 claims
- Nuplazid12 claims
- Trintellix12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,111.96
46 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Matthew S. Markis among 8,673 psychiatry physician records in California
Matthew S. Markis, D.O. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 66% of them.
- NPI issued2012 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2016 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 psychiatry physician records list a practice address in Calabasas
They are 18 of the 786 NPPES records with a practice address in Calabasas, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Calabasas → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Aneeta Afzal, M.D.Calabasas, CA 913021396727335
- Rod Amiri, MDCalabasas, CA 913021083769293
- Robert Feeley, M.D.Calabasas, CA 913021518224328
- Roman Garcia, MD, PHDCalabasas, CA 913021033505169
- Tarik Hadzic, M.D., PH.D.Calabasas, CA 913021033559679
- Ronald Persaud, M.D.Calabasas, CA 913021073614913
- Rebecca Reyes, M.D.Calabasas, CA 913021316156607
- Ronald Sager, M.D.Calabasas, CA 913021346324183
Common questions
What is Matthew S. Markis, D.O.'s NPI number?
Matthew S. Markis, D.O.'s National Provider Identifier (NPI) is 1780944470, issued on May 29, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Matthew S. Markis, D.O. located?
The NPPES record lists a practice address at 23622 Calabasas RD, Calabasas, CA, 91302. Phone: (818) 921-4300. Providers update this record themselves, so call before visiting.
How can I verify Matthew S. Markis, D.O.'s license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew S. Markis, D.O. prescribe under Medicare Part D?
In 2024, Matthew S. Markis, D.O. had 192 Medicare Part D claims for 18 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.